[6.18.y] Missing TLB fix for 6.18.y

[6.18.y] Missing TLB fix for 6.18.y

[Mario Limonciello]

Hi,

Mark Janes noticed that commit e9f58ff991dd4 ("drm/amdgpu: rework how we 
handle TLB fences") was missing from 6.18.y.

This went into 7.0-rc5 and was backported to 6.19.y but not 6.18.y.

This is because this was one of those cases that the "Fixed" commit was 
in both 6.18 and 6.19.y as different hashes:

b4a7f4e7ad2b120a94f3111f92a11520052c762d
f3854e04b708d73276c4488231a8bd66d30b4671

So can you please backport e9f58ff991dd4 to 6.18.y?

Thanks,

RE: [6.18.y] Missing TLB fix for 6.18.y

[Deucher, Alexander]

Public

> -----Original Message-----
> From: Limonciello, Mario <Mario.Limonciello@amd.com>
> Sent: Monday, May 4, 2026 3:43 PM
> To: stable@vger.kernel.org
> Cc: mjanes@netflix.com; Deucher, Alexander <Alexander.Deucher@amd.com>
> Subject: [6.18.y] Missing TLB fix for 6.18.y
>
> Hi,
>
> Mark Janes noticed that commit e9f58ff991dd4 ("drm/amdgpu: rework how
> we handle TLB fences") was missing from 6.18.y.
>
> This went into 7.0-rc5 and was backported to 6.19.y but not 6.18.y.
>
> This is because this was one of those cases that the "Fixed" commit was in
> both 6.18 and 6.19.y as different hashes:
>
> b4a7f4e7ad2b120a94f3111f92a11520052c762d
> f3854e04b708d73276c4488231a8bd66d30b4671
>
> So can you please backport e9f58ff991dd4 to 6.18.y?

There are missing dependencies.  Please cherry pick all of the following:

f4db9913e4d3 ("drm/amdgpu: validate the flush_gpu_tlb_pasid()")
e3a6eff92bbd ("drm/amdgpu: Fix validating flush_gpu_tlb_pasid()")
9163fe4d790f ("Revert "drm/amdgpu: don't attach the tlb fence for SI"")
69c5fbd2b93b ("drm/amdgpu: rework how we handle TLB fences")

Thanks,

Alex

Re: [6.18.y] Missing TLB fix for 6.18.y

[Mario Limonciello]

On 5/4/26 14:43, Mario Limonciello wrote:
> Hi,
> 
> Mark Janes noticed that commit e9f58ff991dd4 ("drm/amdgpu: rework how we 
> handle TLB fences") was missing from 6.18.y.
> 
> This went into 7.0-rc5 and was backported to 6.19.y but not 6.18.y.
> 
> This is because this was one of those cases that the "Fixed" commit was 
> in both 6.18 and 6.19.y as different hashes:
> 
> b4a7f4e7ad2b120a94f3111f92a11520052c762d
> f3854e04b708d73276c4488231a8bd66d30b4671
> 
> So can you please backport e9f58ff991dd4 to 6.18.y?
> 
> Thanks,

Alex just noted there are a few other dependencies.

f4db9913e4d3 ("drm/amdgpu: validate the flush_gpu_tlb_pasid()")
e3a6eff92bbd ("drm/amdgpu: Fix validating flush_gpu_tlb_pasid()")
9163fe4d790f ("Revert "drm/amdgpu: don't attach the tlb fence for SI"")

Re: [6.18.y] Missing TLB fix for 6.18.y

[Greg KH]

On Mon, May 04, 2026 at 07:52:21PM +0000, Deucher, Alexander wrote:
> Public
> 
> > -----Original Message-----
> > From: Limonciello, Mario <Mario.Limonciello@amd.com>
> > Sent: Monday, May 4, 2026 3:43 PM
> > To: stable@vger.kernel.org
> > Cc: mjanes@netflix.com; Deucher, Alexander <Alexander.Deucher@amd.com>
> > Subject: [6.18.y] Missing TLB fix for 6.18.y
> >
> > Hi,
> >
> > Mark Janes noticed that commit e9f58ff991dd4 ("drm/amdgpu: rework how
> > we handle TLB fences") was missing from 6.18.y.
> >
> > This went into 7.0-rc5 and was backported to 6.19.y but not 6.18.y.
> >
> > This is because this was one of those cases that the "Fixed" commit was in
> > both 6.18 and 6.19.y as different hashes:
> >
> > b4a7f4e7ad2b120a94f3111f92a11520052c762d
> > f3854e04b708d73276c4488231a8bd66d30b4671
> >
> > So can you please backport e9f58ff991dd4 to 6.18.y?
> 
> There are missing dependencies.  Please cherry pick all of the following:
> 
> f4db9913e4d3 ("drm/amdgpu: validate the flush_gpu_tlb_pasid()")
> e3a6eff92bbd ("drm/amdgpu: Fix validating flush_gpu_tlb_pasid()")
> 9163fe4d790f ("Revert "drm/amdgpu: don't attach the tlb fence for SI"")
> 69c5fbd2b93b ("drm/amdgpu: rework how we handle TLB fences")

In what order please?  Can someone provide a list of the full set?

confused,

greg k-h

RE: [6.18.y] Missing TLB fix for 6.18.y

[Deucher, Alexander]

Public

> -----Original Message-----
> From: Greg KH <gregkh@linuxfoundation.org>
> Sent: Tuesday, May 12, 2026 1:22 PM
> To: Deucher, Alexander <Alexander.Deucher@amd.com>
> Cc: Limonciello, Mario <Mario.Limonciello@amd.com>;
> stable@vger.kernel.org; mjanes@netflix.com
> Subject: Re: [6.18.y] Missing TLB fix for 6.18.y
>
> On Mon, May 04, 2026 at 07:52:21PM +0000, Deucher, Alexander wrote:
> > Public
> >
> > > -----Original Message-----
> > > From: Limonciello, Mario <Mario.Limonciello@amd.com>
> > > Sent: Monday, May 4, 2026 3:43 PM
> > > To: stable@vger.kernel.org
> > > Cc: mjanes@netflix.com; Deucher, Alexander
> > > <Alexander.Deucher@amd.com>
> > > Subject: [6.18.y] Missing TLB fix for 6.18.y
> > >
> > > Hi,
> > >
> > > Mark Janes noticed that commit e9f58ff991dd4 ("drm/amdgpu: rework
> > > how we handle TLB fences") was missing from 6.18.y.
> > >
> > > This went into 7.0-rc5 and was backported to 6.19.y but not 6.18.y.
> > >
> > > This is because this was one of those cases that the "Fixed" commit
> > > was in both 6.18 and 6.19.y as different hashes:
> > >
> > > b4a7f4e7ad2b120a94f3111f92a11520052c762d
> > > f3854e04b708d73276c4488231a8bd66d30b4671
> > >
> > > So can you please backport e9f58ff991dd4 to 6.18.y?
> >
> > There are missing dependencies.  Please cherry pick all of the following:
> >
> > f4db9913e4d3 ("drm/amdgpu: validate the flush_gpu_tlb_pasid()")
> > e3a6eff92bbd ("drm/amdgpu: Fix validating flush_gpu_tlb_pasid()")
> > 9163fe4d790f ("Revert "drm/amdgpu: don't attach the tlb fence for
> > SI"") 69c5fbd2b93b ("drm/amdgpu: rework how we handle TLB fences")
>
> In what order please?  Can someone provide a list of the full set?


That is the full set.  Please apply the following in descending order:
commit f4db9913e4d3 ("drm/amdgpu: validate the flush_gpu_tlb_pasid()")
commit e3a6eff92bbd ("drm/amdgpu: Fix validating flush_gpu_tlb_pasid()")
commit 9163fe4d790f ("Revert "drm/amdgpu: don't attach the tlb fence for SI"")
commit 69c5fbd2b93b ("drm/amdgpu: rework how we handle TLB fences")


Thanks!

Alex

>
> confused,
>
> greg k-h